<?php
$_REQUEST=array();
$_REQUEST["username"]=""." or username=\""."\";
$_REQUEST["password"]=""." or username=\""."\";
echo "SELECT * from users where username=\"".$_REQUEST["username"]."\" and password=\"".$_REQUEST["password"]."\"";
//echo "SELECT * from users where username=\"".$_REQUEST["username"]."\" or username=\""."\" and password=\"".$_REQUEST["password"]."\" or password=\""."\"";
?>